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Vibrating barrier: a novel device for the passive control of structures under ground motion.

Cacciola P, Tombari A - Proc. Math. Phys. Eng. Sci. (2015)

Bottom Line: The ViBa is a structure buried in the soil and detached from surrounding buildings that is able to absorb a significant portion of the dynamic energy arising from the ground motion.Numerical and experimental analyses are performed in order to investigate the efficiency of the device in mitigating the effects of ground motion waves on the structural response.A significant reduction in the maximum structural acceleration of 87% has been achieved experimentally.

View Article: PubMed Central - PubMed

Affiliation: School of Environment and Technology, University of Brighton , Brighton BN2 4GJ, UK.

ABSTRACT

A novel device, called vibrating barrier (ViBa), that aims to reduce the vibrations of adjacent structures subjected to ground motion waves is proposed. The ViBa is a structure buried in the soil and detached from surrounding buildings that is able to absorb a significant portion of the dynamic energy arising from the ground motion. The working principle exploits the dynamic interaction among vibrating structures due to the propagation of waves through the soil, namely the structure-soil-structure interaction. The underlying theoretical aspects of the novel control strategy are scrutinized along with its numerical modelling. Closed-form solutions are also derived to design the ViBa in the case of harmonic excitation. Numerical and experimental analyses are performed in order to investigate the efficiency of the device in mitigating the effects of ground motion waves on the structural response. A significant reduction in the maximum structural acceleration of 87% has been achieved experimentally.

No MeSH data available.


Time-history acceleration response of the node at the top of the dome in the case of a single structure and a structure coupled with the ViBa for the 1989 Loma Prieta earthquake event.
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RSPA20150075F15: Time-history acceleration response of the node at the top of the dome in the case of a single structure and a structure coupled with the ViBa for the 1989 Loma Prieta earthquake event.

Mentions: Finally, the performance of the ViBa is tested for a wide-band signal. The real ground motion recorded in the 1989 Loma Prieta earthquake event is thus applied to the system. The ViBa is designed by equation (4.9) by considering the mass ratio mViBa/m=1.5. FigureĀ 15 shows the comparison of the responses in terms of the acceleration at the top of the dome for both cases of a single structure and a structure protected by the ViBa. The comparison of the time-history accelerations show a beneficial effect due to the ViBa achieving a reduction in the maximum acceleration of 43.2% (RF=0.568).Figure 15.


Vibrating barrier: a novel device for the passive control of structures under ground motion.

Cacciola P, Tombari A - Proc. Math. Phys. Eng. Sci. (2015)

Time-history acceleration response of the node at the top of the dome in the case of a single structure and a structure coupled with the ViBa for the 1989 Loma Prieta earthquake event.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4528655&req=5

RSPA20150075F15: Time-history acceleration response of the node at the top of the dome in the case of a single structure and a structure coupled with the ViBa for the 1989 Loma Prieta earthquake event.
Mentions: Finally, the performance of the ViBa is tested for a wide-band signal. The real ground motion recorded in the 1989 Loma Prieta earthquake event is thus applied to the system. The ViBa is designed by equation (4.9) by considering the mass ratio mViBa/m=1.5. FigureĀ 15 shows the comparison of the responses in terms of the acceleration at the top of the dome for both cases of a single structure and a structure protected by the ViBa. The comparison of the time-history accelerations show a beneficial effect due to the ViBa achieving a reduction in the maximum acceleration of 43.2% (RF=0.568).Figure 15.

Bottom Line: The ViBa is a structure buried in the soil and detached from surrounding buildings that is able to absorb a significant portion of the dynamic energy arising from the ground motion.Numerical and experimental analyses are performed in order to investigate the efficiency of the device in mitigating the effects of ground motion waves on the structural response.A significant reduction in the maximum structural acceleration of 87% has been achieved experimentally.

View Article: PubMed Central - PubMed

Affiliation: School of Environment and Technology, University of Brighton , Brighton BN2 4GJ, UK.

ABSTRACT

A novel device, called vibrating barrier (ViBa), that aims to reduce the vibrations of adjacent structures subjected to ground motion waves is proposed. The ViBa is a structure buried in the soil and detached from surrounding buildings that is able to absorb a significant portion of the dynamic energy arising from the ground motion. The working principle exploits the dynamic interaction among vibrating structures due to the propagation of waves through the soil, namely the structure-soil-structure interaction. The underlying theoretical aspects of the novel control strategy are scrutinized along with its numerical modelling. Closed-form solutions are also derived to design the ViBa in the case of harmonic excitation. Numerical and experimental analyses are performed in order to investigate the efficiency of the device in mitigating the effects of ground motion waves on the structural response. A significant reduction in the maximum structural acceleration of 87% has been achieved experimentally.

No MeSH data available.